Dunstall Norton

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Beach

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Was looking through old swap meet pics and found this. Saw this Dunstall Norton in 2017 at Oley PA. Kind of rough but interesting. Think the guy was
Dunstall Norton
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asking about $2700. Dual disc, supercharged, Dunstall forks, Dunstall rearset
 
I seriously doubt anyone here would shy away from attempting the task at 2700 providing clear title, not blown or locked up, and all the pieces salvageable.... Make the pig squeal then hang the pearls and lipstick later.... or part it out.
 
We don't have one this side of the pond... May I borrow yours?
 
Finding this at Oley was like finding a unicorn in a basically vintage American swapmeet.
 
We don't have one this side of the pond... May I borrow yours?
As long as you promise not to thrash it..... I've got to do the bearings in that: 'Up and Downy' bit in the middle..... makes a terrible noise as you pull away! I'll probably go for Superblends :) (And it's a b*gger finding neutral when you stop!)
 
Go to youtube and search supercharged norton. Almost all of the videos of supercharged commandos are the supercharged bike idling for a minute in someone's driveway, and then maybe the owner gives a blip on the throttle or two. I know a guy who was a long time Norton "collector/wheeler/dealer", he always rambled on about drouin superchargers. He had 3 of them, and offered me one cheap, if I would install it on my bike back somewhere in the '80's. He had numerous bikes of his own but never mounted one on any of his own bikes, so I was suspicious of how well they worked. He was constantly rambling on about nothing being better than a supercharged Norton commando... To this day, the only one's I see are idling for a minute on youtube or for sale with Tiny amounts of mileage on them. You would think that if these superchargers were so awesome, some people would be raving about them and bragging about the thousands of miles they've put on their supercharged commando...

It's hard to understand why these units are so valuable when it seems that almost noone has a supercharged commando that runs reliably. I could see someone using a supercharger for making drag strip passes where you only have to get off the line and get down the quarter mile, but something tells me that supercharging a 47HP parallel twin is not a magic equation for some superbike...

I suppose my dislike of these units stems from the fact that the guy I knew was a "teller of tall tales" in regards to all things Norton, and had I tried to fit this piece of crap to my commando, I would have spent a lot of time and money chasing this fantasy, and maybe ruined my bike in the process.

I know the guy from scotland will be along any moment now to tell us how great his supercharger works, to keep the myth alive. I just want to know how come there aren't 4 guys, or 10 guys with these units on their daily rider's?? I believe dynodave has said he has a supercharger. When he mounts one and gives it his approval, I might start to believe these things are worth something, but to me they are just part of another commando myth...
 
I remember when the Druin first came out there was a magazine article about them. They claimed 90 hp from a Norton and noted that the stock cam worked better with it than a combat cam. "The throttle feels like you're turning a rheostat, instant response" was a comment I remember.

My boss at the time was a mechanical engineer who had worked for Cummins on the design of diesel engines. He told me that a blower consumes half of the power it makes in heat. "You don't want to supercharge that beautiful motorcycle if you want it to last", he said.
 
I remember when the Druin first came out there was a magazine article about them. They claimed 90 hp from a Norton and noted that the stock cam worked better with it than a combat cam. "The throttle feels like you're turning a rheostat, instant response" was a comment I remember.

My boss at the time was a mechanical engineer who had worked for Cummins on the design of diesel engines. He told me that a blower consumes half of the power it makes in heat. "You don't want to supercharge that beautiful motorcycle if you want it to last", he said.
 
High compression motors generally don't do well with forced induction. 8:1 maybe. 10:1 forget about it

A blown rotary Norton, now you're talking!
 
You know.... a pair of Amals is enough to keep one occupied keeping in trim.

I'm living the myth with them again in the morning because of trash escaping the filters.
 
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